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View Full Version : trick to get more stable vdimm on the dfi nf4!



saaya
05-06-2005, 06:09 AM
http://img10.echo.cx/img10/664/dfinf4vdimmtrick26kp.jpg

big thx to bigtoe again :toast:








UPDATE:
pretty late yeah, but better than never :D
here are results from my rig (dfi nf4 fortron 350W) using the trick
i have the 3.3v rail set to 3.51v here is the vdim i meassured chosing different vdimm options in bios

<TABLE BORDER WIDTH=600><TR><TD>vdimm set in bios</TD><TD>vdimm idle</TD><TD>vdimm load</TD><TD>3.3v rail idle </TD><TD>3.3v rail load</TD><TR><TD>3.0v</TD><TD>3.09v</TD><TD>3.09v</TD><TD>3.51v</TD><TD>3.48v</TD><TR><TD>3.1v</TD><TD>3.20v</TD><TD>3.20v</TD><TD>3.51v</TD><TD>3.47v</TD><TR><TD>3.2v</TD><TD>3.31v</TD><TD>3.30v</TD><TD>3.51v</TD><TD>3.47v</TD><TR><TD>3.3v</TD><TD>3.38v</TD><TD>3.32v</TD><TD>3.50v</TD><TD>3.47v</TD></table>

so it looks like the dfi nf4 overvolts vdimm by almost 0.10v
this means you should set your 3.3v rail to 3.5v+ and select only up to 3.2v in bios. this should result in a pretty stable 3.3v vdimm voltage. to make sure you get a really nice and clean 3.3v vdimm id suggest to set your 3.3v rail to 3.6v. for vdimm above 3.3v i suggest you use the 5v vdimm feed and get a 20 to 24pin psu adapter if your on a 20pin psu and dont want to upgrade. to everybody who uses this trick, keep in mind that sata hdds and other components of the system use this rail as wel and it might make them unstable or kill them over time
never heard of it, but theres always a risk you should be aware of :)

elh4jj4j
05-06-2005, 06:13 AM
nice , i will try it

mcnbns
05-06-2005, 06:18 AM
Is that red thing on the middle diagram another jumper?

Do you have to go about it the same way as enabling the 4V VDIMM option?

Thanks!

AMD-me
05-06-2005, 06:30 AM
nice, :thumbsup:

ZhaoYun
05-06-2005, 06:58 AM
I'll give it a shot. :woot:

P_1
05-06-2005, 07:52 AM
Is that red thing on the middle diagram another jumper?

Do you have to go about it the same way as enabling the 4V VDIMM option?

Thanks!
yes its another jumper

Magnj
05-06-2005, 07:54 AM
sweet. How high will the Powerstream 520 go on the 3.3 rail?

_Eduard_
05-06-2005, 07:59 AM
I thought this was already possible without changing the jumpers, so good information :toast:

uwackme
05-06-2005, 09:36 AM
Im not all the way up yet, but my Powerstream does 3.5V on the 3.3V rail....on NForce2, the NB chip uses Vdd and ALSO uses 3.3Vrail as power sources. So you get higher max OC with 3.3V rail UP, even if you dont needed it for Vdimm usage.

Bennah
05-06-2005, 09:42 AM
Thanks Bigtoe :toast:

perithimus
05-06-2005, 09:59 AM
I will definitely have to try that. Just hoping my psu will hold up. I think it will.

s7e9h3n
05-06-2005, 10:04 AM
This is nice for those of us who have a Zippy and use the DFI. But I don't see myself running my 3.3 rail @ 3.9 so I can use my BH-5 @ 275, 3.8V. :p:

[_Silence_]
05-06-2005, 10:19 AM
Can i use it with a 20pin Enermax 460watts and a 20pin to 24pin adapter?

craig588
05-06-2005, 11:09 AM
It's not reccomended.

mcnbns
05-06-2005, 11:12 AM
sweet. How high will the Powerstream 520 go on the 3.3 rail?
3.8V is what it says on the box here. :)

[_Silence_]
05-06-2005, 11:17 AM
It's not reccomended.

My Enermax is fully moded, so it would be better than running from 5v right?

[_Silence_]
05-06-2005, 12:48 PM
']My Enermax is fully moded, so it would be better than running from 5v right?

Just tested with my Enermax 460watts and 24pin adapter and I dont advise to do it. Very unstable Vdimm, eg: 3.3 rail @ 3.6v and 3.4v in bios gave me Vdimm from 3.45 to 3.35, to much variation :S
So really no go with 20pin PSU :S

bachus_anonym
05-06-2005, 01:00 PM
']Just tested with my Enermax 460watts and 24pin adapter and I dont advise to do it. Very unstable Vdimm, eg: 3.3 rail @ 3.6v and 3.4v in bios gave me Vdimm from 3.45 to 3.35, to much variation :S
So really no go with 20pin PSU :S
It's most likely not because your PSU is 20-pin... Either raise your rail to 3.7v (measured with DMM) or lower vdimm in BIOS. Give it .3v overhead as see what if it helps...

Magnj
05-06-2005, 03:43 PM
this is sweet.I dont have a jumper though...gonna have to get one from school next week , would one from a HD work. And can anyone direct me to a link on how to adjust OCZ Voltage?

saaya
05-06-2005, 08:01 PM
Is that red thing on the middle diagram another jumper?

Do you have to go about it the same way as enabling the 4V VDIMM option?

Thanks!

yeah, just use a spare jumper and move the "jumper block" down one row :)


I thought this was already possible without changing the jumpers, so good information :toast: no, the bios wont let you use vdimm options above 3.2v without this trick :)


sweet. How high will the Powerstream 520 go on the 3.3 rail?
im sure it has been posted somewhere on the forum, prolly when ocz released the psu... i think 3.8v... maybe more :)


']Can i use it with a 20pin Enermax 460watts and a 20pin to 24pin adapter?
i dont see why it shouldnt work...
if you have a 20 to 24 pin adapter you can use the 5v feed for vdimm as well, but i wouldnt recommend it unless you go for 3.6v+ and have some airflow on the mosfet/heatsink on the top right corner of the board.


It's not reccomended.
what isnt recommended?


']Just tested with my Enermax 460watts and 24pin adapter and I dont advise to do it. Very unstable Vdimm, eg: 3.3 rail @ 3.6v and 3.4v in bios gave me Vdimm from 3.45 to 3.35, to much variation :S
So really no go with 20pin PSU :S
did you use the trick or did you use the 5v feed?
how did you meassure vdimm?


this is sweet.I dont have a jumper though...gonna have to get one from school next week , would one from a HD work. And can anyone direct me to a link on how to adjust OCZ Voltage?
the powerstream line has small pots on the back of the psu to increase the rails, the modstream series doesnt have pots at all, even if you open the psu...

the only way to icnrease the 3.3v rail on the modstream would be to do the 3.3v sense wire mod :)

craig588
05-06-2005, 08:20 PM
what isnt recommended?

Using a 20 pin PSU with the DFI NF4 mobo.

saaya
05-06-2005, 08:26 PM
its not? i heard it works fine though... the only extra lines used are the 5v lines if you use the 5v vdimm feed afaik. but im not sure...

they also recommend a 400W+ psu :D

im using a 350W 20 pin psu and the board runs great and ocs great... :D

craig588
05-06-2005, 09:22 PM
There is one extra 12V, 5V and 3.3V line. (And a ground for some reason but there is no problem with the number of grounding lines on a 20 pin ATX plug)

saaya
05-07-2005, 01:20 AM
yeah i know, but from what i can see only the extra 5v is getting used for the 5v vdimm feed, the other ones are just hooked up with the other 12v and 3.3v lines of the mobo...

thats why a 20pin psu works fine, at least with the dfi board, unless you use the 5v feed :)

Wingz
05-07-2005, 01:36 AM
just to make sure i understand this...

1. change the jumpers as shown in the middle picture

2. you will then only be able to select 3.2v in the bios.

3. increase the voltage on psu's 3.3+ line and the vdimm will then increase as well

just wondering the "mofsets and heatsinks that will stay cool" are they the ones located on the top right of the board? and also how do you know what vdimm voltage you are on when adjusting the 3.3+ line.

Thanks.

craig588
05-07-2005, 02:00 AM
It basicly works like the bios mod for the DFI NF3 mobo. It unlocks all of the options and keeps feeding the memory off of the 3.3 line.

Solder a wire to pin 7 on the first memory slot and you can measure the voltage getting supplied to the memory off of that. For the 3.3 voltage coming out of the PSU measure an orange wire. (The ATX spec says that orange = 3.3 line)

cupra
05-07-2005, 02:06 AM
aua, that is so nice, thanks saaya

:toast:

SIOUX
05-07-2005, 02:44 AM
Good info indded sayaa.....thanks:)

saaya
05-07-2005, 04:49 AM
thx a lot :bows:
again, big thy to tony :woot:


just to make sure i understand this...

1. change the jumpers as shown in the middle picture

2. you will then only be able to select 3.2v in the bios.

3. increase the voltage on psu's 3.3+ line and the vdimm will then increase as well

just wondering the "mofsets and heatsinks that will stay cool" are they the ones located on the top right of the board? and also how do you know what vdimm voltage you are on when adjusting the 3.3+ line.

Thanks.

1. increase the 3.3v rail
2. set the jumpers
3. set vdimm (you can select up to 4v in bios but i would only set it to 3.3v rail -0.1v)

the higher your 3.3v rail is above the vdimm you selected the more stable it will be. to get a 100% stable and clean vdimm i suggest to have the 3.3v rail 0.3v above the vdimm you selected, but if your psu has a stable 3.3v rail then you should be able to get vdimm closer to the 3.3v rail without any problems and still very stable and clean vdimm. :)

craig explained how to meassure the voltages :)

cantankerous
05-07-2005, 05:07 AM
Man I love this forum. Always great stuff to learn and try out. Just to let everyone know this works without a hitch. Having gone too high on my vdimm but am reading well above 3.3v which was impossible before this mod. Heatsink is nice and cool to the touch as promised. God Bless DFI and OCZ for a great combo in board and psu. Now its time to see how much higher I can get on my BH-6.

Wingz
05-07-2005, 05:55 AM
my 3.3+ line is reading 3.36v, so its safe to set it to 3.6v? btw i'm using the OCZ 520 Powerstream.

[_Silence_]
05-07-2005, 06:10 AM
did you use the trick or did you use the 5v feed?
how did you meassure vdimm?

I was using the trick yes. Measured the Vdimm via Software, but with 5v feed it gets very stable and with the trick it has 0.1v variations, even with the 3.3v rail with more 0.3v than vdimm.

magg
05-07-2005, 06:55 AM
its not? i heard it works fine though... the only extra lines used are the 5v lines if you use the 5v vdimm feed afaik. but im not sure...

they also recommend a 400W+ psu :D

im using a 350W 20 pin psu and the board runs great and ocs great... :D
Highly HIGHLY unrecommended to use a 20-pin on their mobos...they just had a press release saying they were no longer going to warranty anybody who was using a 20-pin on their boards, because it was strictly against what they have been telling people forever.

I've seen so many ridiculous problems that have all been caused just because of a 20->24-pin PSU, YOU NEED NATIVE 24-PIN PEOPLE!!

Also, they recommend >480W for their boards, not 400 :D

Sorry, didn't mean to thread hijack, but I hang around the DFI street forums alot and answer these questions so many times that it just kinda happens :p:

Soulburner
05-07-2005, 07:26 AM
20/24 pin PSU thread:

http://www.xtremesystems.org/forums/showthread.php?t=61334

craig588
05-07-2005, 09:10 AM
my 3.3+ line is reading 3.36v, so its safe to set it to 3.6v? btw i'm using the OCZ 520 Powerstream.

You need it higher. Take it to at least 3.8V if you want 3.6V on the memory.

Running 3.6V with a 3.4V 3.3 line doesn't even make sense, where would the extra voltage come from?

bmaffin13
05-07-2005, 10:36 AM
what else uses the 3.3v line? like hd's or mobo stuff? and can it screw anything up cause i need about 3.5v on my bh-5 to hit 265mhz so i guess i would need to crank it up to 3.7 ish on my ocz ps. i don't really mind the heat (idling at about 36c on the PWM right now) but if i can get it lower, it should be better.

Wingz
05-07-2005, 10:40 AM
You need it higher. Take it to at least 3.8V if you want 3.6V on the memory.

Running 3.6V with a 3.4V 3.3 line doesn't even make sense, where would the extra voltage come from?

what i mean is that is it safe for the 3.3+ line on the psu to run at 3.6v? My ram needs only 3.3v to run at 260.

EMC2
05-07-2005, 10:47 AM
FYI... you always want the PS rail supplying the mem at least 0.2V higher than what you will set Vmem to.... anything less than that and the Vmem control circuit in stock form can't hold proper regulation. Oh... and using individual jumpers works better IMO than the standard 6-pin jumper ;)

Peace :toast:

Magnj
05-07-2005, 11:03 AM
Ok so.
I would adjust the pots on my powerstream untill I get 3.7-3.8V(where do i measure this from?)

Move jumpers

Then I would adjust Vmem in bios .2-.3V under what my PSU is. So say i set my PSU to 3.8V, I can use Vmem 3.5-3.6ish

And I would also like to know what else uses 3.3V Rail. What wil lthis effect. and what does DFI say about this warranty wise

EMC2
05-07-2005, 12:50 PM
Ok so.
I would adjust the pots on my powerstream untill I get 3.7-3.8V(where do i measure this from?)
Best spot to measure it is on the MB... for the 3.3V you can measure from any of the bottom four 3.3V Vmem jumper positions to ground (you can pick ground up from the copper plane area around the MB mounting screw hole next to the jumpers).

Move jumpers

Then I would adjust Vmem in bios .2-.3V under what my PSU is. So say i set my PSU to 3.8V, I can use Vmem 3.5-3.6ish
If you adjust for 0.25 above your max desired Vmem setting, your good... so say adjust to 3.75V on 3.3V rail you would be good to 3.5V on Vmem setting.

And I would also like to know what else uses 3.3V Rail. What will this effect.
Newer HDs, most of the ICs on your MB, most of your add-in cards. Some data points on voltages for 3.3V, applicable to power in general as well...

All parts are spec'd for +/-5%, so 3.46V would be guaranteed to work and should cause no problems.

Standard parts always tolerate +/-10% with only potential issue being a possibility with marginal designs of instability. That gets you to 3.63V. No safety issues other than standard heat related ones (spelled have good cooling).

Parts are usually spec'd with a +20% absolute max rating on the supply rails (the point above which damage to components can occur). This gets you to 3.96V. Note however that as you approach this point the potential for problems goes up significantly. Again, big key is proper cooling and in this case clean supply rails with low noise, tight regulation, and the absence of power spikes. This is really where PS quality can make or break you and why I use PCPnC supplies (best regulation and noise characteristics, no spikes) and high quality surge suppressors on the AC line on my systems.


and what does DFI say about this warranty wise

I would guess the standard line you would get from any company... they only guarantee and warranty "operation within specified conditions"... meaning +/-5% on the supply rails. But since when does the "warranty restrictions" have anything to do with Xtreme Systems or OC'ing in general ? ;) Besides... without undo expense relative to the MB price, they couldn't tell.

Peace :toast:

*insert standard disclaimer about not trying this at home and proceed at your own risk, blah, blah, blah*

Magnj
05-07-2005, 12:57 PM
super.I think I'll only need 3.55V tops so 3.8Vish sounds godo to me. As far as coolin i have 1 front intake, 1 side, 3 exaust in the back. Going to be getting XP90 + as5, ATI silencer 5 and i guess a multimeter and soldering gun:)

Wingz
05-07-2005, 02:42 PM
ok i set my 3.3+ line on the psu to 3.5v and left the vdimm in bios to 3.3v, then switched off my pc and then changed the jumpers to as shown in the picture. i then booted into the bios and checked my vdimm voltage and it showed 3.28v (usually its 3.33v) so i adjust the pot on the psu till the voltage in the bios went to 3.33v (multimeter shows 3.3+ line is now at 3.55v)

i then ran memtest (20 passes) and all is stable with no errors and then touched the heatsink on the top right of the board which is usually too hot to touch and found it felt very cool :D

the red led is now lit on the back of my ocz psu on the 3.3+ line, i hope its not a problem.

EMC2
05-07-2005, 03:12 PM
ok i set my 3.3+ line on the psu to 3.5v and left the vdimm in bios to 3.3v, then switched off my pc and then changed the jumpers to as shown in the picture. i then booted into the bios and checked my vdimm voltage and it showed 3.28v (usually its 3.33v) so i adjust the pot on the psu till the voltage in the bios went to 3.33v (multimeter shows 3.3+ line is now at 3.55v)
Pretty darn close to my 0.25 recommendation ;)


i then ran memtest (20 passes) and all is stable with no errors and then touched the heatsink on the top right of the board which is usually too hot to touch and found it felt very cool :D

the red led is now lit on the back of my ocz psu on the 3.3+ line, i hope its not a problem.
Just signifies that it is at an "out of spec" voltage :)

BTW... here's a post (http://xtremesystems.org/forums/showthread.php?p=777631#post777631) that shows where you can use your DMM to measure VMem, etc.

Wingz
05-07-2005, 03:58 PM
BTW... here's a post (http://xtremesystems.org/forums/showthread.php?p=777631#post777631) that shows where you can use your DMM to measure VMem, etc.

thanks for the pics they were very useful. found out my vdimm was actually 3.35v using the multimeter so the vdimm readings shown in the bios is only off by 0.02v.

jikdoc
05-08-2005, 05:17 AM
i actually picked up this trick a while ago on this xs thread as a way to use > 3.2v on zippy. http://www.xtremesystems.org/forums/showthread.php?p=807675#post807675

used it for a while before the chill control blew out on my vapo which is much sad since my sandy 3700 comes this monday. been a bad week for me as fx55 died this week as well. that's a lot of moola down the drain

SAE
05-08-2005, 06:37 AM
Too bad it's less stable for me... but may help others. :shrug:

I set 3.8V for 3.3V rail (bios 3.75V), and was trying to get my usual 3.6V out of it (bios 3.65V)...
Did not go well. Voltage in bios was .02V worse, and it could not even pass first step of superpi 32m.

saaya
05-08-2005, 02:14 PM
']I was using the trick yes. Measured the Vdimm via Software, but with 5v feed it gets very stable and with the trick it has 0.1v variations, even with the 3.3v rail with more 0.3v than vdimm.

meassure the vdimm via a multimeter please, maybe the onboard probe is just messed up... if it really fluctuates that much please check if it also fluctuates at lower vdimm settings and if its the same with the 5v feed and 3.3v feed without the trick, maybe your psu or board are faulty.


Highly HIGHLY unrecommended to use a 20-pin on their mobos...they just had a press release saying they were no longer going to warranty anybody who was using a 20-pin on their boards, because it was strictly against what they have been telling people forever.

I've seen so many ridiculous problems that have all been caused just because of a 20->24-pin PSU, YOU NEED NATIVE 24-PIN PEOPLE!!

Also, they recommend >480W for their boards, not 400 :D

Sorry, didn't mean to thread hijack, but I hang around the DFI street forums alot and answer these questions so many times that it just kinda happens :p:
thats what they tell the average joe guys to save themselves from loads of rmas :) im running my dfi with a 350W 20 pin psu and dont have any problems at all :cool:


what else uses the 3.3v line? like hd's or mobo stuff? and can it screw anything up cause i need about 3.5v on my bh-5 to hit 265mhz so i guess i would need to crank it up to 3.7 ish on my ocz ps. i don't really mind the heat (idling at about 36c on the PWM right now) but if i can get it lower, it should be better.

hdds use the 12v rail, and the 5v rail, same for optical drives... sata drives use 3.3v i think, not sure... i think only some videocards use the 3.3v rail as well... the chipset is fed from 5v afaik... i have been running 3.8v vdimm for over 6 months without any problems, but it could cause problems...

as for all ocing and modding, if you cant afford to lose your hardware dont do it :D

EDIT: read emc2's reply :D


ok i set my 3.3+ line on the psu to 3.5v and left the vdimm in bios to 3.3v, then switched off my pc and then changed the jumpers to as shown in the picture. i then booted into the bios and checked my vdimm voltage and it showed 3.28v (usually its 3.33v) so i adjust the pot on the psu till the voltage in the bios went to 3.33v (multimeter shows 3.3+ line is now at 3.55v)

i then ran memtest (20 passes) and all is stable with no errors and then touched the heatsink on the top right of the board which is usually too hot to touch and found it felt very cool :D

the red led is now lit on the back of my ocz psu on the 3.3+ line, i hope its not a problem.
perfect :toast:


Too bad it's less stable for me... but may help others. :shrug:

I set 3.8V for 3.3V rail (bios 3.75V), and was trying to get my usual 3.6V out of it (bios 3.65V)...
Did not go well. Voltage in bios was .02V worse, and it could not even pass first step of superpi 32m.

i guess you need 3.9v on the 3.3v rail or even more to get 3.6v totally stable and clean... so if you want 3.6v or more vdimm its still better to use the 5v feed... but if you want 3.2-3.5v this trick is def helping and a better solution than the 5v feed :)

Jasonxxx
05-08-2005, 02:34 PM
Works perfectly for me, I can only adjust up to 3.6v on the 3.3v line, but I'm stable up to 3.5v vdimm like this, and that is all I need right now anyway....

Thanks, My mosfet is cool to the touch...

saaya
05-08-2005, 03:29 PM
glad its helping :)

3.5v is stable and clean? does it help you to get higher than 3.4v vdimm?

SAE
05-08-2005, 03:55 PM
i guess you need 3.9v on the 3.3v rail or even more to get 3.6v totally stable and clean... so if you want 3.6v or more vdimm its still better to use the 5v feed... but if you want 3.2-3.5v this trick is def helping and a better solution than the 5v feed :)

Yeah, I know, but it's not gonna happen ;)

I don't like to have my rails this high - those times are over after losing 6 IBM HDDs over 2 years... on AXP platform. I don't wanna lose my stuff again, and IMHO those high rails don't really help ocs any on dfi nf4 :shrug:

Great tricks anyways. :up: Keep up the good work, ony and Sascha :toast:

Jasonxxx
05-09-2005, 07:40 AM
glad its helping :)

3.5v is stable and clean? does it help you to get higher than 3.4v vdimm?

Yes, 3.5 is stable, It seems more stable.... I use 3.4v for 255mhz... I will be able to test 3.5v this weekend and see if gives me anymore mhz than using the 5v rail....

I think this the way to go unless you would have to get your 3.3v line over ~3.7-3.8v..... @3.6v I'm ~8.3% over the 3.3v spec which shouldn't hurt the SATA harddrives at all....

:toast:

Lastviking
05-09-2005, 08:56 AM
saaya any modd to get more than 4.0v? :D , i get this board soon and my bh5 memmorys need to feel some power ;)

jinu117
05-09-2005, 09:03 AM
Few PSUs i wouldn't try this on granted it is same as vcap mod.
1) PC&P 510 Dlx.
2) Enermax (pre noisetaker models)
I've had friend who would consistantly kill A64 memory controller doing it on above 2 PSU. He moved on to OCZ Powerstream and had no more dead FX-55 (well at least on memory controller). Zippy is another one that worked fine for months... where is my zippy now... hmmmm -_-;

s7e9h3n
05-09-2005, 01:33 PM
Few PSUs i wouldn't try this on granted it is same as vcap mod.
1) PC&P 510 Dlx.
2) Enermax (pre noisetaker models)
I've had friend who would consistantly kill A64 memory controller doing it on above 2 PSU. He moved on to OCZ Powerstream and had no more dead FX-55 (well at least on memory controller). Zippy is another one that worked fine for months... where is my zippy now... hmmmm -_-;
Here she is.....looks a little different now, eh? ;)
http://img254.echo.cx/img254/9926/zippysmall7ks.jpg

SAE
05-10-2005, 04:18 AM
saaya any modd to get more than 4.0v? :D , i get this board soon and my bh5 memmorys need to feel some power ;)


Most Bh-5 don't like that kinda voltages ;)

TEDY
05-10-2005, 05:08 AM
with my TAGAN 480W this isnt possible, right ?

xgman
05-10-2005, 08:50 AM
Does this trick help the warm boot problem with VX type ram?

Lastviking
05-10-2005, 11:48 AM
Most Bh-5 don't like that kinda voltages ;) Like and like :p: To bad its summer here now but when the winter come back and the bh5 feel -20 temp they wants more power :D

SAE
05-10-2005, 12:45 PM
Like and like :p: To bad its summer here now but when the winter come back and the bh5 feel -20 temp they wants more power :D

:lol:

Yeah... cool temps do help. :up: But I don't have them inside my rig room ;)

saaya
05-13-2005, 07:05 AM
Few PSUs i wouldn't try this on granted it is same as vcap mod.
1) PC&P 510 Dlx.
2) Enermax (pre noisetaker models)
I've had friend who would consistantly kill A64 memory controller doing it on above 2 PSU. He moved on to OCZ Powerstream and had no more dead FX-55 (well at least on memory controller). Zippy is another one that worked fine for months... where is my zippy now... hmmmm -_-;

vcap mod?


with my TAGAN 480W this isnt possible, right ?

why not?

lastviking, really nice to see you again :toast:

well about lower temps, tom holck just told me that his bh5 doesnt like to work below 0°C... wich makes sence, if you cool the memory or cpus the resistance decreases and more current flows through the traces at the same vcore, and if the temp gets too low too much current flows through the chip and can kill it or stop it from working properly ie cold bug @90nm a64s...

Techwarrior
05-18-2005, 07:14 PM
What is the best way to measure 3.3V rail without a multimetre? In BIOS I'm guessin?

thesaucier
05-18-2005, 11:19 PM
I would guess the standard line you would get from any company... they only guarantee and warranty "operation within specified conditions"... meaning +/-5% on the supply rails. But since when does the "warranty restrictions" have anything to do with Xtreme Systems or OC'ing in general ? ;) Besides... without undo expense relative to the MB price, they couldn't tell.

Peace :toast:

*insert standard disclaimer about not trying this at home and proceed at your own risk, blah, blah, blah*


LOL thats right! :clap:

jinu117
05-18-2005, 11:32 PM
vcap mod?



why not?

lastviking, really nice to see you again :toast:

well about lower temps, tom holck just told me that his bh5 doesnt like to work below 0°C... wich makes sence, if you cool the memory or cpus the resistance decreases and more current flows through the traces at the same vcore, and if the temp gets too low too much current flows through the chip and can kill it or stop it from working properly ie cold bug @90nm a64s...

Well, Vcap mod was just me half a sleep typing... the 3.3v line cap mod to vdimm :P

Magnj
05-20-2005, 08:34 AM
ok gogin to buy a multi in liek a half hour. Have extra jumpers from mobo. So I measure 3.3V Rail on either 24Pin connector or Vmem spot over top of DIMM1? Also I notice My SATA Hard Drive is running off the 3.3V rail( orange wire i nthe connector ) Is this going to fubar my drive. How far can I go? 3.7 ok? that will give me about 3.4-3.5 on Vdimm, should get me to 250 2-2-2-5 hopefully

Magnj
05-20-2005, 12:37 PM
ok so reding from the bottom pins of the 3.3V/5V jumper I adjusted from 3.3( exactly, nice job ocz :P ) up to 3.7. Almost had a heart attac when the lead wire hit one of the bottom pins on the 5V side, but booted right back up. Then I switched jumper, again almost a heart attack getting my hand in my case to the jumper, got them set then when i booted i got a series of 5 or so quick POST kinda beeps. Turned it off. Check my connections, booted back up fine. Adjusted bios to 3.5V. Smart guardian reports 3.47Vdimm. Is this correct so far?

Gonna go push my memory now.

thesaucier
05-20-2005, 03:27 PM
ok so reding from the bottom pins of the 3.3V/5V jumper I adjusted from 3.3( exactly, nice job ocz :P ) up to 3.7. Almost had a heart attac when the lead wire hit one of the bottom pins on the 5V side, but booted right back up. Then I switched jumper, again almost a heart attack getting my hand in my case to the jumper, got them set then when i booted i got a series of 5 or so quick POST kinda beeps. Turned it off. Check my connections, booted back up fine. Adjusted bios to 3.5V. Smart guardian reports 3.47Vdimm. Is this correct so far?

Gonna go push my memory now.
LOOKs good to me! :clap:

Magnj
05-20-2005, 06:34 PM
yea. I eventualy bumped it to 3.79 ran 2-2-2-10 at 3.6V. Looped Memetest all the way through about 5 times. Tried to boot window, went in. It crashed. Now it does the XP loading screen but instead of going to the login it gives me this screen that says windows XP, Looks kind of like an install screen. But nothing ever comes up. If I alt + TAB I can see 2 tasks running. Windows log in and Log into windows? Thins the voltage corrupted my SATA?

s7e9h3n
05-20-2005, 08:56 PM
yea. I eventualy bumped it to 3.79 ran 2-2-2-10 at 3.6V. Looped Memetest all the way through about 5 times. Tried to boot window, went in. It crashed. Now it does the XP loading screen but instead of going to the login it gives me this screen that says windows XP, Looks kind of like an install screen. But nothing ever comes up. If I alt + TAB I can see 2 tasks running. Windows log in and Log into windows? Thins the voltage corrupted my SATA?
Yup, sure sounds like it.....have you tried lowering your fsb to boot into windows?

Magnj
05-21-2005, 03:54 AM
yea Im back at stock 3.3V rail and 200FSB...still giving me his goofy screen. THink I can save her?

saaya
05-21-2005, 04:12 AM
What is the best way to measure 3.3V rail without a multimetre? In BIOS I'm guessin?
the bios is totally off on the dfi and some other current boards, i wouldnt use the bios readout to adjust any rail or voltage!


Well, Vcap mod was just me half a sleep typing... the 3.3v line cap mod to vdimm :P ah ok :D
that mod doesnt work on those psus? hmmm didnt know that


yea Im back at stock 3.3V rail and 200FSB...still giving me his goofy screen. THink I can save her?
hmmm you might have corrupted your windows install because the mem wasnt stable at that speed... or you corrupted your windows install because your hdd was overvolted? hmmm i hope its the first... do a repair install of xp ...
good luck!

well if its the hdd then we at least know that some sata hdds dont like 3.9v...

Magnj
05-21-2005, 04:25 AM
mem ran through memtest full through like 5 or 6 times. No errors

Can't sem to get XP to boot from the disc I have. I get the windows loading screen like right before the login scren. Then I get this screen, with a windos logo on it. It kinda fades in. ut theres nothing there. If I alt + Tab I can see " Log into windows" and "Windows Login". I guess I'll keep trying to boot from the disk.

and it was 3.79V not 3.9. I'm pretty sure the HD isn't damaged because Windows tries to load up. I probbably messed up the registry or something when it shut down all nastily. Ugh. I don't have the origianl disk I installed windows from either, I'm using a differnet disk. Ugh I hate overclocking :P

saaya
05-21-2005, 04:27 AM
no, i meant maybe your mem wasnt stable at the speeds you were running when windows corrupted? so thats why it corrupted... if the memory is stable now its still corrupted and wont let you boot :D

3.8v on the 3.3v rail hmmm thats above 10%, it could have damaged your hdd or made it freak out and corrupt windows... but id be surprised if thats the issue...

Magnj
05-21-2005, 04:33 AM
ok well I tested in memtest my memory at 248 2-2-2-10. And at the moment I can't recall what i booted into windows at but i think it was either 248x10 or 245x10. Either way my rail was at 3.79. So it was memtest stable? Memory is definitly stable now 200x11 2-2-2-10 at 3.2V. Should I try reseting CMOS? Gonna suck redoing my settings but i guess not worse than losing os

saaya
05-21-2005, 04:52 AM
memetest stable =! windows stable!!!

many people think that if memory is memtest stable its rockstable, but thats not the case... :)

Magnj
05-21-2005, 04:58 AM
super. So what do you suggest? I cant get into windows. Just that screen. Resettign CMOS now, how do I repair my OS install?

Magnj
05-21-2005, 05:12 AM
ok well reset CMOS and that doesnt help. I leave the CDROM in during boot but it doesnt boot from the disk( sorry im an idiot when it comes to OS stuff, I never listened in class )

saaya
05-21-2005, 05:27 AM
resetting the cmos wont fix the corrupted os on your hdd :lol:
you need to boot from your xp cd and do a repari install :)

hmmm you could try this: keep ctrl pressed during the boot and select "last working settings" (dunno what its called in english) and it might work again...

s7e9h3n
05-21-2005, 05:47 AM
resetting the cmos wont fix the corrupted os on your hdd :lol:
you need to boot from your xp cd and do a repari install :)

hmmm you could try this: keep ctrl pressed during the boot and select "last working settings" (dunno what its called in english) and it might work again...
Honestly, you should just reformat and start over (unless there's something vital on the drive you need). You can try to repair the install, but it's not a guaranteed fix. Here's how to do it:
1. Boot from your Windows install disk and let it load all the drivers and stuff
(If you're running raid, you'll have to hit f6 and install the raid drivers)
2. Then you'll come to the page talking about EULA? hit f8 to continue
3. IIRC, windows then searches for previous installs and then gives you the option to either continue with the current install, or repair using the reocovery console or something like that. You're going to want to chose to continue the install, NOT the repair console thingy.
4. I think this is the point where windows will give you the option to either install over your current os or repair it. This is where you choose the repair option and then everything's just like any other install from this point on. You're going to have to have your reg. key handy since you have to enter it again. I use this method when I'm changing motherboards but want to keep my windows install the same. I'm pretty sure it's not as optimal as a fresh install, but it gets the job done. Now if your whole file system is corrupted, I'm not sure if this method can fix everything. Also, the way you describe the windows boot screen just "fading in" sounds like it possibly could be a prob with the memory or voltages. Hope this helps. GL

Magnj
05-21-2005, 05:47 AM
Cool I will try that when I get my hands on the disk I used last time. KNow where I can get XP Pro SP1 cheap?

And it's not fading in in the way your picturing it. Its fading in on purpos, the OS is doing it. Ugh, maybe I'll take some screen shots today if i can get a camera

EDIT: yhpm
-saaya

Magnj
05-21-2005, 07:27 AM
So im back in windows. I have no idea how it worked as i'm pretty sure I used an XP Home CD and CD Key to recover my XP Pro install? Anyway, my network settings are more FUBAR than they were to begin with and My ntivirus stuff is blowing up. I think instead of trying to fix this stuff, I'm going to gather all my Oc utilites, some install files, back them up and reformat and re install everything. Ugh I so don't want to reinstall Halflife 2, oh well. I'll start this project tonight I guess. NEdd to get away from this stupid thing

Magnj
05-21-2005, 10:38 AM
Ok so I didn't wait. Posting on the 64 Rig now. Nforce Drivers and stuff installed. :)

Millyons
05-21-2005, 02:56 PM
OK this might be a stupid question, but why did DFI even bother with the voltage switch jumpers, why not just run it of the 5v rail like some epox boards?

thesaucier
05-21-2005, 03:02 PM
OK this might be a stupid question, but why did DFI even bother with the voltage switch jumpers, why not just run it of the 5v rail like some epox boards?

I think you would have to ask the board designers that.

hovo73
05-21-2005, 03:59 PM
Quick questions, this trick will benefit me only if I can adjust the 3.3V rail right? If I can't do it, it is not going to offer me any advantage like higher or more stable voltage, right?

Mikesta
05-21-2005, 06:07 PM
Let me get this straight.

If I set my jumpers on JP17 from 1-2 to 2-3 (i.e. Expand DRAM's Voltage up to 4v) then I am definately running my Vdimm off the 5v rail?

If so I'm a bit of a :banana::banana::banana::banana::banana::banana::b anana::banana:. I bought the OCZ 520W Powerstream for the 3.3 adjustable rail's so I didn't need to run off the 5v rail.

As my VX is only using 3.3v I'm much better off using Bigtoe's 'trick' aren't I?
I'm going to set my rails 3.3v rail at around 3.4, will that do?

Also by using the 'trick' will I achieve better temps on my PWM IC and/or mosfets? Will my Ram be cooler?

Also will I now avoid the dreaded cold boot?

Just a few ignorant newbie questions

Magnj
05-21-2005, 07:04 PM
Let me get this straight.

If I set my jumpers on JP17 from 1-2 to 2-3 (i.e. Expand DRAM's Voltage up to 4v) then I am definately running my Vdimm off the 5v rail?

Yes




If so I'm a bit of a :banana::banana::banana::banana::banana::banana::b anana::banana:. I bought the OCZ 520W Powerstream for the 3.3 adjustable rail's so I didn't need to run off the 5v rail.

As my VX is only using 3.3v I'm much better off using Bigtoe's 'trick' aren't I?
I'm going to set my rails 3.3v rail at around 3.4, will that do?

you realy want your rail about.2V above what your goign to use for max stability. I have my rail at 3.67V and I'm running at 3.4V




Also by using the 'trick' will I achieve better temps on my PWM IC and/or mosfets? Will my Ram be cooler?



Mosfets will not be hot as it is not stressed by trying to cut 5V down to 3.3V


Also will I now avoid the dreaded cold boot?

Just a few ignorant newbie questions

Don't know

Mikesta
05-23-2005, 01:58 PM
Guy,

I don't think this trick actually works.

I was using the 331 BIOS and had the cold boot bug. Did 'the trick' and boot bug was still around.

Flashed to 510 (still using the trick- 3.5 on 3.3v rail) and boot bug seems to be gone.

My only conclusion is that it must be BIOS related at least to some extent. I'll change back to the 5v rail in 10 hours or so and test if I still have the boot bug.

As a side note my 520w OCZ powerstream now makes a clicking noise when I try and Prime95 with large FTT's.

Magnj
05-23-2005, 03:53 PM
Ha, a clicking noise is definitly not good. Make sure its not the fan though, I had somehting hitting it once

^don.k's^
05-24-2005, 01:10 PM
It's a bit confusing... We claimed to a board capable to raise voltage up to +3,2volts, when we had it, we go back to 3,3v line mod's... :stick:

Isn't that moving the problem in the mosfet (getting it so hot) to the PSU (modding it, if not adjustable PSU) ??? :confused:

pershoot
05-24-2005, 01:30 PM
Guy,


As a side note my 520w OCZ powerstream now makes a clicking noise when I try and Prime95 with large FTT's.

you sure thats not the caps in the dimm area? if it is in the dimm area, thats normal. happens to me and others as well, as the caps charge and discharge with load. kind of sounds like air passing through a radiator in a WC system. happened with the nf3 branded board as well (from what i have heard).

if it is the PSU, RMA it immediately.

Eldonko
05-24-2005, 02:00 PM
Just read through this thread, very interesting, and useful :) Just two questions though:
1) The main benefits to this mod is a more stable voltage going to the RAM and less heat from MOSFETS, correct?
2) Set RAM volts to 3.2v in BIOS when changing voltage on PS?

My apologies if these questions have been answered already, I just wanted to clarify before giving this a try. :woot:

Mikesta
05-24-2005, 02:09 PM
you sure thats not the caps in the dimm area? if it is in the dimm area, thats normal. happens to me and others as well, as the caps charge and discharge with load. kind of sounds like air passing through a radiator in a WC system. happened with the nf3 branded board as well (from what i have heard).

if it is the PSU, RMA it immediately.

It sounds like the PSU but I'll check caps. It's really quite load, I've NEVER had it happen before and it only seems to happen when I Prime95 with large FFT's not small.

Coincidently it's the first time I've ran my VX off the 3.3v rail (MEM=3.3, PSU 3.52). I'll switch back to 5V rail and see what happens.......

I sure hope I don't have to RMA my PSU! I have to send it interstate and only have a generic 400w as back up. not sure if it is even compitible with DfinF4 board!

saaya
05-24-2005, 03:50 PM
OK this might be a stupid question, but why did DFI even bother with the voltage switch jumpers, why not just run it of the 5v rail like some epox boards?

because it wont work for vdimm below 3.2v afaik, the lower the vdimm you derive from the 5v the hotter the mosfet on the top right of the board gets.


Quick questions, this trick will benefit me only if I can adjust the 3.3V rail right? If I can't do it, it is not going to offer me any advantage like higher or more stable voltage, right?
yupp


Just read through this thread, very interesting, and useful :) Just two questions though:
1) The main benefits to this mod is a more stable voltage going to the RAM and less heat from MOSFETS, correct?
2) Set RAM volts to 3.2v in BIOS when changing voltage on PS?

My apologies if these questions have been answered already, I just wanted to clarify before giving this a try. :woot:
yupp aaaand yupp :D

good luck Mikesta

vanovich
05-24-2005, 05:47 PM
hi all ,some intresting stuff ,im a newbie with this,so ive got some questions 1)doese this trick only work with certain boards ? 2) can i do it on my dfi 875-t mb ? 3) where abouts on the board is the jumper block ?

Eldonko
05-24-2005, 06:39 PM
Thanks Saaya :D

saaya
05-24-2005, 06:41 PM
hi all ,some intresting stuff ,im a newbie with this,so ive got some questions 1)doese this trick only work with certain boards ? 2) can i do it on my dfi 875-t mb ? 3) where abouts on the board is the jumper block ?

uhm no, it only works with the dfi nf4 afaik... i dont think any other board has this jumper block and vdimm circuicy :D

bienvenidos eldonko! :D

Mikesta
05-26-2005, 02:05 AM
Thanks Saaya,

PSU is okay! I'm back to using 5v rail and I get no clicking whatsoever. I guess my PSU doesn't like my 3.3v rail being up'd to 3.5, then having Prime95 (Large FFT's) drawing from it!

Now if only I can find a BIOS that is as stable as this 331-1, performs alittle better...and has no cold boot issues! one can only dream....

Snark42
05-27-2005, 01:00 PM
I just bought an OCZ Powerstream 600watt PSU. It's great XD

Since I'll be adjusting the 3.3v rail and I dont want to damage my SATA drives I'm just using a Molex-sata power connector. You can also just use a molex coonector instead of the SATA power connector. That's why SATA drives have both connection types, so you can power them if you dont have the SATA power connectors.

Using this method will allow you to adjust the 3.3volt rail without risk of damaging the SATA drives (cuz Molex don't use an orange wire...Orange=3.3v)

pablo
05-27-2005, 01:03 PM
the powerstreams get adjusted while the pc is on right? just need to know before i try it.

Eldonko
05-27-2005, 01:11 PM
I think so, however I only adjust mine when I'm in the BIOS.

Very good to know Snark, I have been using the SATA connectors on my HDs but I will switch em to molex to be safe. :)

pablo
05-27-2005, 02:13 PM
so you change it while in the bios. makes sense

Snark42
05-27-2005, 09:59 PM
I've been adjusting mine while in windows and running apps too. I've been measuing them with the new Voltage Meter I bought today. No adverse effects, but I was only making minor adjustments. I'm gonna wiat till my replacement PC4000 VX arrives before I start doing much (running off of the one good stick of PC3200 VX I still have, which is part of the kit I'm RMA'ing).

euclid
05-28-2005, 01:38 PM
i just have a thought to add, if you are not doing this jumper mod and are using the 3.3v rail(stock voltage) to power the memory... if you set the vdimm in the bios to a certain voltage, for instance 3.2v, but then check with an actual multimeter to see that vdimm reading is not accurate in bios and you are only getting 3.1v actual... you could then do this jumper mod without overvolting the psu 3.3v rail, only to be able to set vdimm higher in bios(maybe 3.4v) to get true 3.2v into the the memory.

this should be another situation that this jumper mod could improve. if i am wrong please corret me.

Soulburner
05-28-2005, 03:21 PM
i just have a thought to add, if you are not doing this jumper mod and are using the 3.3v rail(stock voltage) to power the memory... if you set the vdimm in the bios to a certain voltage, for instance 3.2v, but then check with an actual multimeter to see that vdimm reading is not accurate in bios and you are only getting 3.1v actual... you could then do this jumper mod without overvolting the psu 3.3v rail, only to be able to set vdimm higher in bios(maybe 3.4v) to get true 3.2v into the the memory.

this should be another situation that this jumper mod could improve. if i am wrong please corret me.
You should be able to get 3.2v into the memory without any jumper changes if you have a good rail on your PSU. Mine is set at 3.40v and I get 3.22v solid. However if you can't do that then no I don't think your method will work, you can not get more voltage without changing the output of the PSU.

Damien
05-28-2005, 03:38 PM
So all you do is switch your jumpers to those, increase the pot on your 3.3 line on your psu and you're done?

Rezag1000
05-28-2005, 03:54 PM
So I guess this MOD is only good for Powerstream users since only they can raise the voltage on their 3.3v rail.

mikead_99
05-28-2005, 03:57 PM
So I guess this MOD is only good for Powerstream users since only they can raise the voltage on their 3.3v rail.

It's convenient for Powerstream users, but nearly any psu can have the 3.3V sense line mod done, easily. Then you can raise those too.

Rezag1000
05-28-2005, 04:19 PM
May I ask how a Blue storm owner would go about increasing the voltage on the 3.3v rail then? :D :D

Damien
05-28-2005, 04:25 PM
There are adjustable pots when you open up the psu itself.

mikead_99
05-28-2005, 04:35 PM
May I ask how a Blue storm owner would go about increasing the voltage on the 3.3v rail then? :D :D

If it has a 3.3V sense line, read this: http://xtremesystems.org/forums/showthread.php?t=37574. Your only limit will be wherever that psu's OVP kicks in.

edit to add: You can do that mod anywhere along the sense line. The pics show up by the psu case, but I found it more convenient down by the ATX connector. Wherever works best for you.

euclid
05-28-2005, 07:59 PM
You should be able to get 3.2v into the memory without any jumper changes if you have a good rail on your PSU. Mine is set at 3.40v and I get 3.22v solid. However if you can't do that then no I don't think your method will work, you can not get more voltage without changing the output of the PSU.

i didnt mean you would be getting more than 3.2v, but if your bios is already set at 3.2v and your not actually getting 3.2v to your mem(from multimeter reading) its not the powersupply fault... its the bios not having an accurate reading. you'd have to trick the bios into overvolting beyond 3.2 in order to actually get a true 3.2 in the multimeter, which the psu 3.3v rail set to stock can handle.

Five-Seven
05-29-2005, 08:17 AM
what happens, if I set 3,3V Vdimm with 3,36V on the 3,3V rail?
can something blow up, if the 3,3V rail can't support the needed vdimm?

Snark42
05-29-2005, 08:24 AM
I believe you would just have an unstable vdimm around 3.3volts. That's not good to have, but shouldn't blow anything up in the short term.

Damien
05-29-2005, 10:02 AM
Can someone quote me and please answer me before I kill something :p. So you can't just increase the pots internally (fortron) and it'll still work? Do I HAVE to do the sense wire mod for this trick? I may just do the 5v and deal with it...

Snark42
05-29-2005, 10:35 AM
So all you do is switch your jumpers to those, increase the pot on your 3.3 line on your psu and you're done?

yes, but be sure to measure the 3.3 line with a Multi-Meter/Volt Meter



OFF TOPIC: Heh, this is post #42 for me......"Long Live <b>The Hitch-Hikers Guide to The Galaxy: A Trilogy in Five Parts</b>!!!!! XD XD"

Five-Seven
05-29-2005, 11:10 AM
I believe you would just have an unstable vdimm around 3.3volts. That's not good to have, but shouldn't blow anything up in the short term.

i tried now, but doesn't work well. Maximum Vdimm was 3,24V but very unstable.
So i had to switch to 5V Rail again but the fu**ing Mosfet gets extremely hot :caution:

thesaucier
05-29-2005, 11:12 AM
Can someone quote me and please answer me before I kill something :p. So you can't just increase the pots internally (fortron) and it'll still work? Do I HAVE to do the sense wire mod for this trick? I may just do the 5v and deal with it...

If you have a adjustable pot for the 3.3 that will adjust the 3.3 voltage high enough for you then you dont need the sence wire mod. The only reason for the sence wire mod is to be able to adjust the 3.3 voltage.

ninja_xxx
05-29-2005, 12:19 PM
has anyone tried this trick without a psu with adjustable rails...
what happens if you choose like 3.3 rails in the bios would you get 3.3v cause thats the max for the 3 rail, right. or would you still get 3.2.
what happens if you pick 3.4?

just interested i guess....

Damien
05-29-2005, 12:31 PM
OK I thought that's all it was...good news for me then. GO FORTRON! :)

xgman
05-29-2005, 02:01 PM
So I guess this MOD is only good for Powerstream users since only they can raise the voltage on their 3.3v rail.


huh? Ther are tons of different PS's that you can adjust the 3.3 line up.

cantankerous
05-29-2005, 07:00 PM
Wondering... the new 510 bios has an option for 0.03+v. Can you enable this bios setting is you have the jumper set to feed more volts to the dimms from the 3.3v rail of your psu or will it do nothing or worse yet damage something? 0.03v isn't much but it might be just enough to keep 1-2fsb stable without jacking up another whole 0.1v on your psu and bios.

Has anyone with this 3.3v mod used this setting successfully? I am dying to try it but don't want to be guinea pig incase something fubars.

Thanks.

Lastviking
05-29-2005, 09:52 PM
Wondering... the new 510 bios has an option for 0.03+v. Can you enable this bios setting is you have the jumper set to feed more volts to the dimms from the 3.3v rail of your psu or will it do nothing or worse yet damage something? 0.03v isn't much but it might be just enough to keep 1-2fsb stable without jacking up another whole 0.1v on your psu and bios.

Has anyone with this 3.3v mod used this setting successfully? I am dying to try it but don't want to be guinea pig incase something fubars.

Thanks.

+0.03 works fine with 3.2vmem+ if you got +3.3 rail enogh high.

cantankerous
05-30-2005, 04:11 AM
ok thanks. I have the jumper set as page 1 on this thread shows. I have my 3.3v rail up to 3.45 so I should be able to get 3.33 if I use this option in the bios. I wasn't sure if this option only worked if the dimms were fed from the 5v rail. I didn't want anything to go on me if I decided to yank the extra volts from the 3.3v rail. Thank you for your clarification. I'll go give it a try.

Five-Seven
05-30-2005, 05:40 AM
has anyone tried this trick without a psu with adjustable rails...
what happens if you choose like 3.3 rails in the bios would you get 3.3v cause thats the max for the 3 rail, right. or would you still get 3.2.
what happens if you pick 3.4?

just interested i guess....

see my previous post :)

Snowman89
05-30-2005, 08:34 AM
i think dfi thought of this in teh beginning, why would they others send so many spare jumpers :p

Lastviking
05-30-2005, 09:26 AM
One more thing vmem in smartguardian are 3.39v then its real 3.46v tested with multimeter..so if you have 3.33v in bios its more like ~3.38v so you need atleast +3.3 @3.5v+

saaya
06-07-2005, 03:43 PM
what happens, if I set 3,3V Vdimm with 3,36V on the 3,3V rail?
can something blow up, if the 3,3V rail can't support the needed vdimm?


I believe you would just have an unstable vdimm around 3.3volts. That's not good to have, but shouldn't blow anything up in the short term.
exactly :)


has anyone tried this trick without a psu with adjustable rails...
what happens if you choose like 3.3 rails in the bios would you get 3.3v cause thats the max for the 3 rail, right. or would you still get 3.2.
what happens if you pick 3.4?

just interested i guess....
read the thread! :P

thx for the infos lastviking! :)

[G.N.U.]Fragman
06-15-2005, 01:46 PM
any wise comments on a Tagan 480W guy....has it got the adjusteble pots inside the psu or should i just live with 3.2 for now...aint ready to do physicallly changes as pot modding to psu or board atm.

Malves
06-22-2005, 09:30 PM
saaya any modd to get more than 4.0v? :D , i get this board soon and my bh5 memmorys need to feel some power ;)

http://www.xtremesystems.org/forums/showthread.php?t=66624

MonkSP
07-04-2005, 07:14 AM
Which other components use the 3.3 rail? My 3.3 rail is set @ 3.54 to have a true 3.3 rail. Its working perfectly. My PSU is a OCZ Powerstream and can delivers 3.8 in that line. But how much can I deliver without hurting the components?

undefeatedone
08-07-2005, 03:11 PM
Few PSUs i wouldn't try this on granted it is same as vcap mod.
1) PC&P 510 Dlx.
2) Enermax (pre noisetaker models)
I've had friend who would consistantly kill A64 memory controller doing it on above 2 PSU. He moved on to OCZ Powerstream and had no more dead FX-55 (well at least on memory controller). Zippy is another one that worked fine for months... where is my zippy now... hmmmm -_-;

I have a PCP&C 510W Dlx SLI. I'm thinking about doing the 5V vdimm mod to get 3.5V with my PC4000 VX Gold. Does he mean I shouldn't do the 3.3V mod, the 5V mod, or both?

saaya
09-22-2005, 03:38 PM
Which other components use the 3.3 rail? My 3.3 rail is set @ 3.54 to have a true 3.3 rail. Its working perfectly. My PSU is a OCZ Powerstream and can delivers 3.8 in that line. But how much can I deliver without hurting the components?
sata hdds afaik and pci devices, other than that only the mainboard to generate vdimm and sometimes the chipset voltage.
hard to tell what will hurt components. ive been running 3.8v for almost a year and 3.5v for half a year now without any problems.
well one of my hdds died and two had corruption problems, but tha has nothing to do with the 3.3v rail since the dont even use that rail.


I have a PCP&C 510W Dlx SLI. I'm thinking about doing the 5V vdimm mod to get 3.5V with my PC4000 VX Gold. Does he mean I shouldn't do the 3.3V mod, the 5V mod, or both?
id suggest you use the 5v feed option to get 3.5v vdimm. so switch the jumperblock on the dfi mainboard to 5v feed, and in case your using a 20pin psu, get a 20 to 24pin psu adapter :)

Flib
11-08-2005, 02:37 PM
Current SATA HDDs aren't using the 3.3V rail!
The 3.3V wire of the SATA connector isn't in the current spec and not used yet. Maybe in a few months/years it will be used.

My PSU has no 3,3V wire on the SATA connector(native!). There are also Molex-> SATA adapters around and it works without 3,3V.

3,3V is only used by mem, pci cards and maybe some onboard components.
So you shouldn't get HDD corrupction because of too high 3,3V rail!

funkflix
03-13-2006, 01:19 PM
2 days ago, i placed a temp.-sensor on the Vdimm mosfet and today i started memtest 1.60 and the temps of the mosfet reached 80°C easy! I already had installed the single jumper on the jumper-table, bcs. i had this mod installed before(but i switched back to the +5V bcs. of testing with higher vdimm), so i switched back to the +3.3. Now look at the temp. difference.. i was really impressed! :)

Before -

http://213.202.211.105/gravedigga/Temp/before.AVI

After -

http://213.202.211.105/gravedigga/Temp/after.AVI

Really nice mod! :toast:

Spyrus
03-18-2006, 08:27 AM
A question from me:
When setting the jumber to 3.3V i cannot have vdimm over 3.08 Volts.
I need 3.12 volts & the only way that i can get it is by putting the jumber to 4V option.

So this tip here will help or my PSU is responsible for its crappy 3.3 rail?
ANTEC True Power 430W-20pin is my PSU by the way.

I know that it is not recommended to run at 4V jumber when someone wants less than 3.2Vdimm...am i right?
I use a 120mm that blows to that area,have no high temps but i am still concerned with low vdimm(3.12) with 4v jumber.

funkflix
03-18-2006, 08:36 AM
U need a +3.3V railmod on ur PSU then.

h3x0r_1984
12-12-2006, 12:58 AM
I know it's been a long time since people haven't posted here,but i have a problem with the trick on my board.I have a very profi Vsense (http://www.crazypc.ro/forum/showthread.php?t=5611) on my Enermax Noisetaker.One pot adjusts 3.3V between 3.3V and a Max value...and the other pot...adjusts the Max value.
Now i have set the the 3.3V rail at 3.56V measured on a profi multimeter.I set the jumpers in the correct position....and if i set VDIMM at 3.4V..all i get is 3.3V rock stable(read in the BIOS).If i set VDIMM at 3.3V i get the same thing.With or without +0.03 Enable.What's the problem?Why can't i get 3.4V VDIMM with a 3.56V on the rail ? The difference between VDIMM and 3.3V rail is too small ?? The first posts said some thing about a 0.25 difference to a have a proper regulation and a rock stable VDIMM.
But i saw that JasonXXX had a 3.6V on the rail..and a 3.5V stable on VDIMM,on a PC&C.Or was he saiyng bollocks?

I should mention that the voltages are rock stable..and i have only a 0.05 Drop on the 12V rail between load and idle.
PS:Where can i measure the VDIMM on the board?

Magnj
01-16-2007, 06:54 PM
Old thread Resurrection!
I think you need to be measuring off the board to be sure of what voltages you are getting. You can measure how much Voltage your RAM is getting by using a multi and grounding one lead and touching the other to a small circle near the DIMM, half will be while half will be black. Touch either side one will just be -, and that should tell you how much voltage our rams are getting

Magnj
01-16-2007, 07:09 PM
Is there a backup of that original picture..It would be quite useful, I could host it if needed.

And while I'm at it I have a question.
I have this jumper trick ( I think, I haven't looked at this stuff in a while But I'm pretty sure I have this jumper trick done unless there is another Jumper trick ) anyway, I have my 3.3v Rail at 3.55 and I have this jumper trick, bit in the DFI 406 BIOS I'm not being allowed to select more than 3.2V o_O whats goin on?

funkflix
01-17-2007, 03:59 AM
http://mitglied.lycos.de/schinderhannesbo2/dfivdimmtrick.jpg

Magnj
01-17-2007, 07:12 AM
Awesome, does anyone mind If I mirror this on Flickr?

And could anyone tell me why I would not be seeing more than 3.2V with this trick?
I have the jumpers set right still from last year but when I flashed my BIOS to 4-06 I get no option to choose more than 3.2...

funkflix
01-17-2007, 07:24 AM
Host it wherever u want. ;)

U can only choose > 3,2V if u are not on Auto-Vcore and some other things i already forgot about..

Magnj
01-17-2007, 07:45 AM
Yea I know about that. I have a feeling I have to switch back to standard, choose a non auto voltage, and then go back to the trick.

halcy
02-18-2008, 09:44 AM
Resurrecting again. Does anyone have a diagram of where to measure the vdimm on an SLI-DR with a multimeter?

I am having a bizarre problem, I have a pair of 1GB Ballistix DDR sticks running on this motherboard in a media center pc setup. The machine is on 24/7, either fully on or in standby. And in the last 8 months I have had to RMA the ram twice. What happens is the machine is fine when its on, itll come in and out of standby no problem for weeks or months on end, however when I actually have to physically power the machine off for more than a few minutes it will then cease to boot, giving me the dreaded memory beeps. The only thing I can think to check is the voltage during standby/full operation, does anyone else have any suggestions on what could be wrong?

Is standby harder on ram than running normally 24/7? I can't imagine how it could be but I don't design the boards. I am also not overclocking these chips at all, running them at a very loose 200 3-4-4-8, stock 2.6V.

Thanks-

halcy
02-18-2008, 10:55 AM
Resurrecting again. Does anyone have a diagram of where to measure the vdimm on an SLI-DR with a multimeter?

I am having a bizarre problem, I have a pair of 1GB Ballistix DDR sticks running on this motherboard in a media center pc setup. The machine is on 24/7, either fully on or in standby. And in the last 8 months I have had to RMA the ram twice. What happens is the machine is fine when its on, itll come in and out of standby no problem for weeks or months on end, however when I actually have to physically power the machine off for more than a few minutes it will then cease to boot, giving me the dreaded memory beeps. The only thing I can think to check is the voltage during standby/full operation, does anyone else have any suggestions on what could be wrong?

Is standby harder on ram than running normally 24/7? I can't imagine how it could be but I don't design the boards. I am also not overclocking these chips at all, running them at a very loose 200 3-4-4-8, stock 2.6V.

Thanks-

Found an answer on where to measure vdimm:
http://www.diy-street.com/forum/showpost.php?p=64740

I measured my Vdimm during standby and it went from 2.62-2.63V down to 2.35V.. can prolonged undervolting cause dimms to fail?